package lock;

/**
 * @author mubei
 * @date 2021/11/20
 * @description    信号灯法
 */
public class TestPC2 {

    public static void main(String[] args) {
        TV tv = new TV();

        new Player(tv).start();
        new Watcher(tv).start();
    }
}



class   Player extends Thread{
    TV tv;
    public Player(TV tv){
        this.tv=tv;
    }

    @Override
    public void run(){
        for (int i = 0; i < 20; i++) {
            if(i%2==0){
                this.tv.play("ah");
            }else{
                this.tv.play("mw");
            }
        }
    }
}

class Watcher extends Thread {
    TV tv;
    public Watcher(TV tv){
        this.tv=tv;
    }

    @Override

    public void run(){
        for (int i = 0; i < 20; i++) {
            tv.watch();
        }
    }
}

class TV{
    // 演员表演  观众等待

    //观众观看 演员表演

    String voice;//表演节目
    boolean flag = true;  // t 表演

    public synchronized void play(String voice){
        if(!flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("演员表演了:"+voice);
        this.notifyAll();
        this.voice = voice;
        this.flag = !this.flag;
    }

    public synchronized void watch(){
        if(flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("观看了:"+voice);
        this.notifyAll();
        this.flag = !this.flag;
    }
}